Forming die for intaglio printing machine plates



Aug. 17, 1937. R. w. BENDER 2,090,096

FORMING DIE FOR INTAGLIO PRINTING MACHINE PLATES Filed June 15, 1936 7 7f 7 W Q 8 2 /4 22 W; 6 Z 20 1 Y INVENTOR, Zafierf if'fik/zaiw w w; 9

ATTORNEYS.

BY g y Patented Aug. 17, 1937 zflgmggg UNITED STATES PATENT OFFIQEFORMING DIE FOR INTAGLIO PRINTING MACHINE PLATES Robert W. Bender,KansasCity, Mm, assignor to Inter-Collegiate Press, Kansas :City, Mol, acorporation of Missouri Application June 15, 1936, Serial No. 85,338 '7Claims. (G1. 153-3) This invention relates to forming die for in- Theprinting surface In of plate 8 is engraved as taglio printing machineplates and the primary at l2 to present any suitable indicia and afterobject is to provide a specially constructed die the engraving operationplate 8 is acted upon by that will form the plates after one sidethereof the .die so that it presents a form such as that 5 has beenengraved and so that one end of the illustrated in Fig. 6. After the dieacts upon the 5 plate will always serve as the guide end to the plateits body is longitudinally arched so that the advantageous results setdown and illustrated in engraving I2 is on the convex side of the platemy co-pending application for United States Letand there is an offsetportion It at one end of ters Patent covering the plate holder forintaglio plate 8 which projects the end of the plate at said 10 printingmachine filed on even date herewith. offset portion below the normalarcuate plane of 10 One of the important aims of this invention theplate. Offset portion I4 is formed froma prois to provide a die of theaforementioned characjected portion of plate 8 when the plate is in ater which has as an important part thereof a planar condition. Referenceto Fig. 1 will readpair of coacting forming members, one of which ilyteach one skilled in the art the manner in is supported by cushionsprings so that after a which the plate is acted upon. 15 plate isarched between the forming members, The die comprises a shoe l6 cored asat l8 the cushion springs will yield to permit unitary so as to presentat least a pair of cavities within movement of both forming members andthe which rest the cushion springs 2i]. These cushion plate for thepurpose of offsetting a portion of springs beal: against the bottom ofone forming the said plate which has been projected beyond member 22 andare strong enough to hold said 20 one end of the said forming members.member 22 against movement in the direction of Another object of thisinvention is the provithe line of force until plate 8 is arched. Thesion of a forming die wherein is included a reother forming member 24 iscarried by an elesilient maintaining means which functions to ment 26that connects the said member 24 to any hold one end of the printingplate against a guide suitable source of power. A guide block 28 hav- 25block so that the said end may serve as an abuting a gauge face 30 andan arcuate shoulder 32 ment when the plate is affixed to the holdingprovided thereon is mounted upon shoe It at means of theintaglioprinting machine. one end of forming members 22 and 24. An an-An even further object of the present invention chor block is carried byshoe [6 at the other 30 is the provision of a forming die having a guideend of said forming members and the maintain- 30 block that is providedwith a gauge face and an ing spring 36 has one end thereof secured toanarcuate shoulder, both of which are located at one chor block 34 bysuitable means such as a clampend of the printing plate so that it willbe held ing strip 38 that is secured to block 3t by main proper placebetween the forming members of chine screws or analo ou m s 9- p 35 thedie and later provided with an offset portion Spring 36 is arched asillustrated in Fig. l and 35 respectively. the free end thereoffrictionally bears against Other objects of the invention will appeardurone end of plate 8 opposite from that end which ing the course of thefollowing specification reis held against gauge face 30. Spring 33proferring to the accompanying drawing wherein the i c s pw y and Overanchor block 34 and 40 preferred embodiment of the invention is illustheportion thereof adjacent the free end which 40 trated. bears againstplate 8 is extended into cavity 42 Figure 1 is a side elevation of aforming die formed in block 34. A similar cavity M created embodying thepresent invention, parts being in gllide b k 28 SeTVeS as means forforming broken away for clearness. gauge face and arcuate shoulder soand 32 re- 45 Fig. 2 is a top plan view of the forming die with p iv ly.45 I the upper forming member and connecting ele- Figure 1 indicates themanner in which these i ment entirely removed. two faces 30 and 32 mergealong a line of meeting Fig. 3 is a cross-sectional view taken on lineso that when the upper forming member 24 is III--III of Fig.2. moveddownwardly .-to the position shown in Fig. 4 is a plan View of theintaglio printing dotted lines of Fig. 1, the end of plate 8 will 50plate before it is acted upon by the die. leave gau e face 30 and beturned pw y y Fig. 5 is an edge view of the same, and, engagement witharcuate shoulder 32. As upper Fig. 6 is an edge elevation of theprinting plate rming member 24 approaches member 22, plate showing thearched and offset condition after re- 8 is arched and longitudinallycontracted but moval from the die. spring 36 is in frictional engagementwith one end 55 Printing plate 8 is usually formed of sheet of plateBthroughout the entire operation. After metal having a thickness whichwill readily perthe plate is arched by bringing together one formmit theplate being arched through the employing member 22 and the other formingmember 24 ment of but very little pressure or force when opwith theplate 8 therebetween, springs 20 are crating the die contemplated bythis invention. compressed so that the projected end forming 60 theoffset portion [4 is turned upwardly by being forced against shoulder32.

The relation between plate 8 and cushion springs 20 is required to besuch that plate 8 will arch before enough pressure is exerted tocompress cushion springs 20.

when it is introduced into' the die and further functions as a 22 and24. It has been found that the end of plate 8 at the offset portion apredetermined given distance from the center of engraving l2 when a dieof thischaracter is used and since engraving i2 is always placed inplate 8 with regard to a center line, it is important I that thedistance between the center of engraving l2 and the end of plate 8 atoffset portion l4 remain the same in all plates formed.

Having thus described the invention, what is claimed as new and desiredto be secured by Letters Patent is:

1. A forming die for printing machine plates comprising a pair ofmovable forming members for arching the plate; a guide block adjacent tosaid forming members; and means for forcing one end of the plate beingformed'against a portion of the guide block before the members are movedtoward each other to arch the plate, said forming members and platebeing movable as a unit after the plate is arched, to force the plateagainst another portion of the guide block to form an offset portionthereon.

2. A forming die for comprising a pair of movable forming members forarching the plate; cushion springs yieldably supporting one of theforming members; a. guide block adjacent to said forming members; andmeans for forcing one end of the plate being formed against a portion ofthe guide block before the other forming member is moved toward the oneforming member to arch the plate, said pair of forming members and platebeingmovable as a unit to compress the cushion springs after the formingmembers come together, to force the plate against another portion of theguide'block to form an offset portion thereon. 1

3. A forming die for printing machine plates comprising a pair ofmovable forming members for arching the plate; cushion springs yieldablysupporting one of the formingmembers; a guide block adjacent to saidforming members; and means for forcing one end of the plate being formedagainst a portion of the guide block before the other forming member ismoved toward the one forming member to arch the plate, said pair offorming members and plate being movable as a unit to compress thecushion springsafter the forming members come together, to further forcethe plate against another portion of the guide block to form an offsetportion thereon, said cushion springs exerting a force to support thesaid one member greater than the force required to move the other membertoward the first member to arch the plate.

4. A forming die for printing machine plates comprising a pair ofmovable forming members for arching the plate; cushion springs yieldablysupporting one of the forming members; a guide block at one end of theforming members having a gauge face and an arcuate shoulder providedthereon; and means for maintaining one end of the plate projected beyondthe forming members and in engagement with the gauge face of the Anabutment member i46ifil tion of the plate at serves to stop the inwardmovement of plate 8 guide for both forming members M,wi11 always remainprinting machine plates guide block before the other forming member ismoved toward the one forming member to arch the plate, said cushionsprings yielding after the plate is arched to cause unitary movement ofthe plate and both forming members to bring a porthe projected endthereof into engagement with said shoulder to form an offset portionthereon;

5. A forming die for printing machine plates comprising a pair ofmovable forming members for arching the plate; cushion springs yieldablysupporting one of the forming members; a guide block at one end of theforming members having a gaugeface and an arcuate shoulder providedthereon; and means for maintaining one end. of the plate projectedbeyond the forming members and in engagement with the gauge face of theguide block before the other forming member is moved toward theonejfo'rming member to arch the plate, said cushion springs yieldingafter the plate is arched to cause unitary movementof the plate and bothforming 'membersto' bring a portion of, the plate at the projected endthereof into engagement with said shoulder toform an offsetportionthereon, said means for maintaining the plate againstthe guideblock being located at the otherend of said forming members and exertingpressure against'the plate throughout the forming operations; I

6. A forming die for printing machine plates comprising a pair ofmovable forming members for arching the plate; cushion springs yieldablysupporting one of the forming. members; a guide block at one end of theforming members having a gauge face-and an arcuate shoulder providedthereon; and means for maintaining one end of the plate projected beyondthe forming members and'in engagement with the gauge face of the guideblock before the othe'r'forming memberv is moved toward the'on'eformingl'memberjto arch the plate, said cushion springs yielding afterthe plate is arched to cause unitary movement of the plate and bothforming members to bring the projected portion of the plate at the endthereof into engagement with said shoulder to form an offset portionthereon, said means for "maintaining the plate against the guideblockbeing' a spring anchored at the other end of said forming membersand bearing against the other end of the plate throughout the formingand offsetting oper'ations;

v 7. A forming die for printing machine plates comprising a pair ofmovable forming members for arching the plate; cushion springs yieldablysupporting'one of the'formingrnembers; a guide block at one end of theforming members having agauge face and anarcuate shoulder providedthereon; and means for maintaining one end of the plate projected beyondthe forming mem bers and in engagement withthe gauge face of the' guideblock as the other forming member is'moved toward the one' formingmembento arch the plate, said cushion springs yieldingafter the plate isarched to'cause unitary movement of i ROBERT W. BEN'DER.

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